PURPOSE: A restaurant business management and connecting system with circumference institutions is provided so that orders of various menus can be performed by connecting the circumference restaurant business institutions with each other. CONSTITUTION: A restaurant business management and connecting system with circumference institutions includes an order processing system (110) and a calculating processing system (300), an exhibition mall (500) of products of the circumference institutions and an information database (400) of the circumference institutions. The order processing system (110) divides a oneself order processing system (110), which processes orders relating to food, which is capable of providing by itself and an outsider order processing system (120). The system (110) further includes a sale management system (210), a purchasing management system (220) and an inventory management system (230). The purchasing information by a host (1) is collected to the sale management system (210), a pure profit is calculated by the sale management system (210) and purchasing management system (220).
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